MPA-25-184

MPA-25-184

MPA-25-184

2、 數(shù)字量信號連接應(yīng)注意的問題

變頻器的輸入信號中包括對運(yùn)行/ 停止、正轉(zhuǎn)/ 反轉(zhuǎn)、點(diǎn)動等運(yùn)行狀態(tài)進(jìn)行操作的數(shù)字量輸入信號（開關(guān)型指令信號），這些信號常來自PLC 的數(shù)字量輸出信號。PLC 通常利用其內(nèi)部的繼電器接點(diǎn)（繼電器輸出型P L C ）或具有開關(guān)特性的元器件（晶體管輸出型PLC）與變頻器相連，得到運(yùn)行狀態(tài)指令，如圖1 和圖2 所示。在進(jìn)行數(shù)字量信號的連接時(shí)應(yīng)注意：

（1）使用繼電器輸出型P L C 與變頻器相連時(shí)，應(yīng)注意接觸不良常帶來變頻器誤動作，因此在實(shí)際接線中要注意連接可靠。

（2）使用晶體管輸出型P L C 與變頻器相連時(shí)，應(yīng)注意晶體管本身的電壓的高低、電流的大小等限制條件在其范圍內(nèi)，保證系統(tǒng)的可靠性。

（3）設(shè)計(jì)變頻器的輸入信號電路時(shí)，應(yīng)盡量避免采用繼電器等感性負(fù)載，因繼電器開閉產(chǎn)生的浪涌電流可能引起變頻器的誤動作。

（4）當(dāng)P L C 輸出的開關(guān)信號進(jìn)入變頻器時(shí)，有時(shí)會發(fā)生外部電源和變頻器控制電源之間的串?dāng)_，應(yīng)注意對P L C和變頻器分開接地，避免兩者使用共同的接地線。

NoiseCom UFX-BER 892-1850-3

NoiseCom UFX-CDMA-1900-1

NoiseCom UFX-CDMA-800-1900-2

Noisecom UFX-EB080

Noisecom UFX-EBNO/60/372

NoiseCom UFX-NPR-2492

NoiseCom UFX-NPR700 Noise Power Ratio Test Set

NoiseCom UFX-NPR-L/S Receiver & Transmitter System (2013 Sale )

NoiseCom UFX-NPR-L-S-RCVR

NoiseCom UFX-NPR-L-S-TX

NoiseKen INS-420

NoiseKen INS-420A

Noiseken INS-AX2-420 Impulse Noise Simulator

NoIseKen VDS-220B AC240V 20A Voltage Dip Simulator

Nokia AFEB 465387A.509 U

Nokia AFEJ Module U

NON-WOVEN PILLOW MANUFACTURING MACHINE MADE 2M INDUSTRIES, INC. CANADA

Nook Industries Actionjac 30 Ton Worm Gear Screw Jack 30-BSJ-I

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Norbar Model-11 Torque Multiplier 25:1 3/4" to 2 1/2" 17,000Nm 12,500ft.lbs

Nor-Cal Products 3870-00998 Pendulum Valve  

NORCIMBUS 2880045-01 OPPERATOR INTERFACE PANEL

Nord 10 HP Screw Conveyor Drive

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NORD 11.16 Speed Gear Reducer SK7282AG N360TC

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Nord 9052VF-N250TC 64RPM 35400IN/LB 27.45 Gear Speed Reducer +A-B 30HP 3PH Motor

NORD 90L/4OUS Motor; 9032.1AZB.30L/4 Gearhead " " Rack 3 

Nord Gear Drive SK92372LX-90L/4 sk 90L/4 2HP 3 phase 230/460

NORD GEAR MIXER REDUCER SK102F, SK103F REDUCER 2 STAGE AND 3 STAGE AVAIL

Nord Gear Reducer With Motor

NORD GEAR SK 472-90 L/4 HELICAL GEARBOX 2HP 16.63 RATIO

NORD NORDBLOC GEARBOX SK 772F N180TC-184TC 5 HP MOTOR

NORD NORDBLOC SK 773F-90 L/4 CUS GEARBOX W/ 2 HP MOTOR

NORD POWER TRANSMISSION MOTOR DRIVE 25078 TORQUE

NORD POWER TRANSMISSION MOTOR DRIVE 29745 TORQUE

Nord SK 100 L/4 IG2 Inverter Motor & Gearbox w/ Kuebler Encoder  

NORD SK 9382/42AFB/VL-132M/4 CUS BRE100 HL RD, GEAR REDUCER, CLINCHER, NNB

NORD SK 9382/42AFB/VL-132M/4 CUS BRF100 HL UNICASE HELICAL SHAFT GEARMOTOR, NNB

Nord SK32100-90LH/4CUS Motor 2000 HP 230/460V      

Nord SK62 N250TC 6.35. Superb. Excellent gear reducer.   AVAILABLE

Nord SK62 N250TC 8.78. Superb. Excellent gear reducer.   AVAILABLE

Norden Systems 3222390 031-8570 Circuit Card Assembly

Nordic Solid State Reduced Voltage Induction Motor Controller 2634X00

Nordic Solid State Reduced Voltage Induction Motor Controller 26A34V00

nordon model pa-2302-06 pc board for hot melt applicator

Nordson 1065804A 6 kW Microwave Lamp Head UV cure, Novellus 63-285050-00

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NORDSON 246395 USPP 246395

NORDSON 303541A NSFP 303541A

Nordson 3800 Portable Hot Glue Machine

Nordson 3800 Series Hot Glue Machine w/ Acme Transformer Style SR

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Nordson Model HMIX Hot Glue Tank - 244392G

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Nordson P7,2H,FULFILL Hot Melt System ProBlue 750/60HZ 200-240V 27A   WOW  

NORDSON PA-2302-06 HOT MELT GLUE GUN APPLICATOR CONTROL PANEL CARD MODULE 83392

NORDSON PA-2302-06 USPP PA230206

Nordson R.M.S. - 1014269A

Nordson UM25XE06-MXVCN Applicator Head

Nordson UM25XE07-MXVCN Applicator Head

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NORGREN HERION 2556105-0201 Pressure Valve with Coil&Manifold 2556105 0201

Norlake Specialty X-Former ST-6416 4160VAC 30KV (NIB)

Norma AC Power Analyzer D5155, Wattmeter Measure Voltage, Current, Active Power

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Nortel DS1 Service Module Mfr P/N NTN407AC+ OAM NTN31112 + 2x DS1 NTN312AA

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NORTEL NETWORKS NT5D11AE USPP NT5D11AE

NORTEL NETWORKS NT5D21AA-07 USPP NT5D21AA07

NORTEL NETWORKS NT6P01BA-04 USPP NT6P01BA04

NORTEL NETWORKS NT8D37BA-05 USPP NT8D37BA05

NORTEL NETWORKS NTVQ01BB NSPP NTVQ01BB

NORTEL NETWORKS NTVQ01BB USPP NTVQ01BB

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NORTEL TASMAN NETWORKS MM-DS3-1 RX TX DS3 CLEAR CHANNEL T3 MEDIUM MODULE

North American AC Electric Motor, 125HP, 1780 RPM

NORTH AMERICAN ELECTRIC EXPLOSION PROOF MOTOR XP1840 3 PHASE AC INDUCTION

North American H6416-AMP-00 Guiding Amplifier w/ H6415/H3303 Ultrasonic Detector

North American Rectifier 3000 AMP 12vDC x 460V 12SF-F

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North Atlantic 214C-S-1218

North Atlantic 214C-S-1279

North Atlantic 225

North Atlantic 2250 Digital Analyzing Voltmeter

North Atlantic Industries 5330 Synchro/Resolver Simulator Read 

NORTH ERIC ELECTRONICS DEMAGNETIZER # 43D16309 NSN: 5950-00-237-7302

Northern Technologies 200 Amp NEMA 3R Generator Panelboard - ATS32

Northern Telecom NT7L30AC Automated Fusion Splicing Set, Fiber Fusion Splicer

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NOS  ALLEN-BRADLEY PLC-5/60 PROCESSOR MODULE 1785-L60L 1785L60L SERIES C

NOS  FOXBORO CP30 CONTROL PROCESSOR MODULE P0960AW 1898146460

NOS BOSTON GEAR  PM925T BOSTON GEAR 59478 1/4 HP DC PM MOTOR LIST  600.37

NOS DYNAPOWER RAPID POWER 20.2 KVA 3PH 480V AC TO 15V DC POWER SUPPLY 15KW

NOS RELIANCE B18H1070R-AB AC SERVO MOTOR 3HP 3 HP   2000 RPM 3PH 9.5A 9.5 A AMP

NOS SEW-EURODRIVE 3/4HP 3/4 HP MOTOR GEARBOX 230YY/460Y VOLTS 2599:1 RATIO 3-5/8

NOS Siemens 6SE70 Drive 6SE7016-1EA61-Z, 2.2kW, 380-480VAC

NOS Siemens 6SE70 Drive 6SE7023-4EC61-Z, 15kW, 380-480VAC SER. T-V51547500003

NOS Siemens 6SE70 Drive 6SE7023-4EC61-Z, 15kW, 380-480VAC SER. T-W60347500014

NOS Siemens 6SE70 Drive 6SE7023-4EC61-Z, 15kW, 380-480VAC SER. T-X51147500045

NOS Siemens 6SE70 Inverter Drive 6SE7031-8TF60, Ser. T-U30947600045

NOS Siemens 6SE70 Inverter Drive 6SE7031-8TF60, Ser. T-U30947600049

NOS Siemens Simoreg DC-Master (6RA70) 6RA7078-6FV62-0-Z, Ser. Q6W11Q6W117534200

NOS Siemens Simoreg DC-Master (6RA70) Base Drive 6RA7025-2FV62-0, 4Q, 60A, 460V

NOS Siemens Simoreg DC-Master (6RA70) Drive 6RA7075-6FS22-0-Z, 210/140A, 460V

NOS Siemens Simoreg DC-Master (6RA70) Drive 6RA7082-6FV62-0-Z, 450A/255A, 460V

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NOS TESTED GIANT MAGNETRON VARIAN / BEVERLY TYPE 8763 SFD-341 CEM  COAXIAL USA

NOS TUBE MAGNETRON WORKS   NOS GIANT MAGNETS MUST SEE

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NOS US MOTORS 99023640 40HP 40 HP DC MOTOR 1750/2300 RPM 240V VOLT 289ATZ FR

NOVA (10K50-120/220) Taurus 10kva DC-AC Power Inverter,   Surplus original 

NOVA 252N12 ANALYZER 0.5 AMP 115 VOLT 60 HZ

NOVA 402AS3 USPP 402AS3

Nova Stop NSPB-9000-2652-R Clutch Brake   WOW  

NOVAR CONTROLS 750018110 LINGO SE LOGIC ONE TOUCHSCREEN

NOVAX INDUSTRIES MD267F USPP MD267F

Novellus 02-053993-00 Loadlock Robot Rev.C Concept II Altus  

Novellus 02-053993-02N Loadlock Robot Rev.A Concept II Altus  

Novellus 02-053993-02N Loadlock Robot Rev.B Concept II Altus  

Novellus 02-053993-03N Loadlock Robot Concept II Altus  

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Novellus 02-256142-00N Loadlock Robot Rev.C Concept II Altus  

Novellus 02-256142-01 Loadlock Robot Rev.C Concept II Altus  

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Novellus 02-853993-00 Loadlock Robot Rev.C Concept II Altus  

Novellus 02-853993-01 Loadlock Robot Rev.A Concept II Altus  

Novellus 02-853993-01 Loadlock Robot Rev.B Concept II Altus  

Novellus 03-10641-00 Loadlock Robot Rev.K Concept II Altus  

Novellus 03-10641-01 Loadlock Robot Rev.L Concept II Altus  

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NOVELLUS Systems controller 166/64MEG P/N 02-105157-00

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Novellus, 02-047735-01, Spindle driver shaft assembly

Novtek Test NTS2200A Flash Memory Endurance Cycling Systems

Now Covered by INNO Instrument's 3      

Now Reduced By 10%

Noyes AFL Singlemode M200 Fiber OTDR 1310/1550 Range SM VFL M 200 Handheld M210

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Noyes C850 Compact QUAD OTDR

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Returns: Accepted within 3 days

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LOT of(3) Barber Colman Input Card A 11008 2 Maco 3 III

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Barber colman Model # 7SD491030000, OMRon K3N, Screen.

Barber Colman HRS Sharpener Operators Manual

BARBER COLMAN 6-10 THRU 16-56 HOB MAINTENANCE MANUAL

Returns: Accepted within 3 days

BARBER-COLMAN / SMITHS THERMOSTATIC SWITCH TP302-0-0-1 NSN: 5930-00-812-7964

Invensys / Barber Colman MPR-5733 Damper Actuator

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